Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb4ad74c240944a…

MALICIOUS

PDF

85.2 KB Created: 2021-08-10 10:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6fe7de18815756f12c4d1d9f2d5cab2c SHA-1: 0d2a1d369e6cb6046da5d310bee996f643f56163 SHA-256: 9bb4ad74c240944a463de13be85e3e475d75657540a7365c5d7a70a5f65dbe54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple domains, including compromised CMS uploads and disposable hosting, with one URL specifically mentioning 'keygen euro truck simulator 2'. This suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://tsg-edinstvo.ru/userfiles/file/jedozukunixujodoxazot.pdf In PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/32307611003.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/1ijljtpt4kr1bmrv7ban2p8cql/82878932940.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/woruguxolonaxeze.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/q33nuneuvk9kfeoduck9cdns56/suniliwubul.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/60986309054.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/71259665479.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/28447315535.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/nubiroxukoredor.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608149829a8e5---renuwela.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/vorixefowew.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608670dfed19c---revitexok.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/77088598204.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/a3d3d361b86903ecc339b891f31fc76d/zuwazipovufifexa.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/xibekurikiwit.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16073c549b3b75---gipasenisudo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d9ae46c4f---makidojixow.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/fojevikimetevumifafeluku.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2cce520c2---34756079000.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/17200589261.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/64877642588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=keygen+euro+truck+simulator+2+%28activation+keys%29+1.30.2.2PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 18340 bytes
SHA-256: 7164b7320cd5d14cca1c5b76245471719b861f8d0475657c30d196a8f97af707
font_01_sfnt_off00011342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 11624 bytes
SHA-256: d1d7fde52999d28aba7f97a477f53647e05d478c31478a2731949d53af76d30e
font_02_sfnt_off00012f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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